It is important to ensure that the system is getting the file from the correct vault location.
Turn on client-side tracing to confirm this. The following is an example of typical output from such a trace:
INFO|Core|2872|SPF.Utilities.FileUtilities|DownloadFile|2011/09/19 19:31:47.732|Validating URL 'http://server1/SPFViewDir/64f9bcc2-38fe-445b-bb29-270c22513ac2/View0/Filename.dwg'.|
INFO|Core|2872|SPF.Utilities.FileUtilities|DownloadFile|2011/09/19 19:31:47.748|Downloading file from 'http://server1/SPFViewDir/64f9bcc2-38fe-445b-bb29-270c22513ac2/View0/Filename.dwg' to 'c:\temp\54826c1b-63cf-4354-b60c-387ed7409ef4\Filename.dwg'.|
INFO|Core|2872|SPF.Utilities.FileUtilities|DownloadFile|2011/09/19 19:31:49.342|Decompressing the downloaded file to 'D:\Documents and Settings\E452689\Desktop\Filename.dwg'.|
INFO|Core|2872|SPF.Utilities.FileUtilities|DeCompressFile|2011/09/19 19:31:49.342| Preparing to DeCompress file 'c:\temp\54826c1b-63cf-4354-b60c-387ed7409ef4\Filename.dwg' to 'D:\Documents and Settings\E452689\Desktop\Filename.dwg' .|